*{
  margin: 0;
  padding: 0;
}
body{
  height: 100vh;
  display: flex;
  justify-content: center;
}
.todo{
  width: 500px;
  height: 500px;
  /* border: 1px solid #000; */
  margin-top: 30px;
}
.title{
  font-size: 50px;
  text-align: center;
  color: red;
}
.input-group{
  display: flex;
  font-size: 30px;
}
.label{
  padding: 10px;
}
.content{
  flex: 1;
  font-size: 20px;
}
.btn{
  width: 80px;
  font-size: 30px;
  margin-left: 10px;
}

.list-item{
  display: flex;
  padding: 20px;
  border-bottom: 1px solid #aaa;
  font-size: 26px;
  align-items: center;
}
.item-check{
  width: 30px;
  height: 30px;
}
.item-content{
  flex: 1;
  margin: 0 10px;
}
.close{
  display: none;
}
.list-item:hover .close{
  display: block;
}